From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Materials and construction methods for electrical components, specifically dielectrics and winding.
| Identifier | ExFiles\Box 52\3\ Scan043 | |
| Date | 12th September 1921 | |
| Contd. -2- R6/M9.12.21. material known to us giving high electro inductive capacity. We now find that linseed oil film is equal and more easily obtainable. I do not know why you do not try the single oiled paper .0015" thick, and why two thicknesses of this were used for winding enamelled coated secondary. You will notice that both paper and wilk are only used to carry the oil film, the silk being only like an open gauze, but the silk is much stronger, and if not much dearer, should be far better to handle. I fear it will not be wise to get 2 electrodes and two dielectrics in one strip for winding round a small radius, but you would get on better with strip of 1 dielectric and 1 electrode; this also will allow of inserting the connecting strips. You will notice that in our designs the thin sheet metal (brass) case is large and hence flexible and is constantly squeezed by a strip of spring steel so that good contact will always be maintained inside, between the various connections and a good earth connection on the outside. R. {Sir Henry Royce} | ||